28. Solving a chemistry problem
25. EMF of a galvanic cell
Hg |Hg2Cl |buffer solution |Q*QH2| Pt
equal to 4.2 mV at 25 C. When the original buffer was replaced with another one, the polarity of the element and the EMF value changed: E = -21.75 mV. Calculate the pH of both buffer solutions.
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